How to remove old T-Bird / Firefox installs?

I have a ton of older versions of Thunderbird and Firefox installs eating up as much HD.........when i go into control panel i am told the uninstall file is gone..........i went into the registry and remove them under HKEY_LOCAL_MACHINE>>software, but not sure i really did anything.....as you have guessed i have always installed updates over the top....any thoughts on clean up ?

Hi,
BTW, as a rule, I always uninstall previous versions but now it's too late for that... Start uninstalling them, from newest version to oldest, one by one.
For instance, if you have firefox 1.0.3-1.0.7, remove the 7, then 6, then 5 etc. Finally clean the registry with ccleaner or regseeker or whatever you use, reboot if you like, then install the newest version(s).
Mrk

Hi,
BTW, as a rule, I always uninstall previous versions but now it's too late for that... Start uninstalling them, from newest version to oldest, one by one.
For instance, if you have firefox 1.0.3-1.0.7, remove the 7, then 6, then 5 etc. Finally clean the registry with ccleaner or regseeker or whatever you use, reboot if you like, then install the newest version(s).
Mrk

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Thanks for getting back....so you are saying that if i were to do as you suggest the uninstall would appear for each previous version ?